David grove



(No'Model.) Y

' D. GROVE.

HEATING PLATE 0B. WALL.

No. 600,526. Patented Mar. 15, 1898.

ITL U' 7711720 7a DAVID GROVE, OF BERLIN, GERMANY.

HEATING PLATE OR WALL.

SPECIFICATION forming part of Letters Patent No. 600,526, dated March 15, 1898.

Application tiled October 6, 1897. Serial No. 654,288. (No model.) Patented in Germany September 22, 1895, No. 88,512; in Italy September 28,1895, 'N0-39,829; in Hungary October 1, 1895,1I0. 4,461; in France April 27, 1897, N0- 266,396; in Brazil June I, 1897, No. 2,284, and in Argentine .Iune20, 1897, No. 2,040l

T0 @ZZ whom, t 771/603/ concern:

Be it known that I, DAVID GROVE, engineer, asubject of the Emperor of Germany, and a resident of No. 2l Friedrichstrasse, Berlin, in the Empire of Germany, have invented new and useful Improvements in Heating Plates or 'Walls, of which the following is a full, clear, and exact description.

The invention has been patented in Germany, No. 88,512, dated September 22, 1895; in Italy, No. 39,829, dated September 28,1895; in Hungary, No. 4,461, dated October 1, 1895; in France, No. 260,396, dated April 27, 1897; in Brazil, No. 2,284, dated June 1, 1897, and in Argentine, N 2,0450, dated June 20, 1897.

This invention relates to heating plates or walls which consist of two sheets of metal inclosing a layer of insulating material, its object being to connect both sheets of the plate or wall by means of metallic connecting-pieces without the latter coming in metallic contact with the two plates. On account of the transverse connection a warping or bending` of the plates is prevented, the strength is increased, and the layer of insulating material is firmly fixed between the two plates. The metallic plates are to be prevented from coming in metallic contact with one another, since otherwise heat would be conducted directly from the directly-heated plate to the other one, thus causing the latter to be overheated at the points at which the plates are connected.

According to this invention the two sheets of the heating plates or wall are connected by metallic rings and attachments fitting into each other, such rings and attachments being placed between the sheets and separated from same by layers of insulating material, so that the metallic connecting-pieces and the sheets do not come in contact with one another. The rings and attachments may be secured to the sheets by means of screws, rivets, and the like, which may be insulated by insulating-disks.

This invention may be adapted for all kinds of` heating plates and walls-for instance, for heating pipes or boilers having double jackets, for kilns and drying-hearths, for hearthplates of baking-ovens, and the like.

In the accompanying drawings the invention is shown adapt-ed to a hearth-plate for transportable baking -ovens, such hearthplate being so arranged that it may be readily drawn out.

Figure 1 is a cross-sectional View of the hearth-plate for the bakingoven; and Fig. 2 is a section of the transverse connection of both sheets on an enlarged scale.

The hearth-plate of the baking-oven consists of two sheets aand b,which at their outer ends are bent up at an angle and connected at the edge in any suitable manner. An insulating layer or iilling c of asbestos, ashes, or other suitable material is arranged between the sheets a and b. Metal rings d are inserted at suitable points between the sheets ct and b, the anges of such rings being connected with the sheet b by rivets c and separated from this sheet by insulating material g,of asbestos or the like. Insulating material g is likewise arranged between the sheet a and the rings d. Every ring d is covered with insulating ma* terial, and upon the latter a metal plug or attachment e is arranged which tits into the ring d. This plug e is connected wth the sheet a by a screw f or other suitable means. In this manner the sheets d and h are firmly and tightly connected together, Whereas the metallic connecting-pieces thereof are prevented from coming in metallic contact with both sheets on account of the insulating material g, g', and g2, so that an overheating at the connecting-points, which may cause the bread or the like to burn, is excluded.

On the bottom of the hearth-plate angular pieces 7i are arranged in the usual manner, to which the spindles for the rollers t are attached which run in guides k, and thus allow the hearth-plate to be conveniently slid in and out.

The present invention is not restricted to the special arrangement as described and shown, but may be modified in many ways.

Having now particularly described and ascertained the nature of this invention, I declare that what I claim, and wish to secure by Letters Patent, is-

1. In heating plates or walls, for instance, hearth-plates for baking-ovens, the combination with two sheets or plates and an inter- IOO the rings d and plugs @with the sheets aand b and insulating material for insulating the connecting-pieces from the sheets substantially as and for the purpose described.

In witness whereof I have hereunto signed my name inthe presence of two subscribing witnesses.

DAVID GROVE.

Witnesses F. KOEN, HENRY I-IAsPER. 

